ALDH1L1 vs. VGLUT | | |

P6 | | |

Wild type | VCN | Pearson’s *r* = 0.056; *p* = 0.906; *n* = 7 |

Wild type | MNTB | Pearson’s *r* = 0.476; *p* = 0.281; *n* = 7 |

Wild type | LSO | Pearson’s *r* = 0.141; *p* = 0.763; *n* = 7 |

*Fmr1* KO | VCN | Pearson’s *r* = 0.248; *p* = 0.489; *n* = 10 |

*Fmr1* KO | MNTB | Pearson’s *r* = 0.207; *p* = 0.566; *n* = 10 |

*Fmr1* KO | LSO | Pearson’s *r* = 0.330; *p* = 0.351; *n* = 10 |

P14 | | |

Wild type | VCN | Pearson’s *r* = 0.450; *p* = 0.225; *n* = 9 |

Wild type | MNTB | Pearson’s *r* = 0.263; *p* = 0.462; *n* = 10 |

Wild type | LSO | Pearson’s *r* = –0.238; *p* = 0.508; *n* = 10 |

*Fmr1* KO | VCN | Pearson’s *r* = –0.507; *p* = 0.135; *n* = 10 |

*Fmr1* KO | MNTB | Pearson’s *r* = –0.675; *p* = 0.023; *n* = 11 |

*Fmr1* KO | LSO | Pearson’s *r* = 0.912; *p* = 0.00009; *n* = 11 |

ALDH1L1 vs. VGAT | | |

P6 | | |

Wild type | VCN | Pearson’s *r* = –0.775; *p* = 0.041; *n* = 7 |

Wild type | MNTB | Pearson’s *r* = 0.274; *p* = 0.553; *n* = 7 |

Wild type | LSO | Pearson’s *r* = 0.057; *p* = 0.903; *n* = 7 |

*Fmr1* KO | VCN | Pearson’s *r* = 0.028; *p* = 0.939; *n* = 10 |

*Fmr1* KO | MNTB | Pearson’s *r* = 0.449; *p* = 0.193; *n* = 10 |

*Fmr1* KO | LSO | Pearson’s *r* = –0.211; *p* = 0.559; *n* = 10 |

P14 | | |

Wild type | VCN | Pearson’s *r* = 0.407; *p* = 0.277; *n* = 9 |

Wild type | MNTB | Pearson’s *r* = 0.099; *p* = 0.785; *n* = 10 |

Wild type | LSO | Pearson’s *r* = –0.436; *p* = 0.208; *n* = 10 |

*Fmr1* KO | VCN | Pearson’s *r* = –0.721; *p* = 0.019; *n* = 10 |

*Fmr1* KO | MNTB | Pearson’s *r* = 0.747; *p* = 0.008; *n* = 11 |

*Fmr1* KO | LSO | Pearson’s *r* = 0.895; *p* = 0.0002; *n* = 11 |

ALDH1L1 vs. Synaptophysin | | |

P6 | | |

Wild type | VCN | Pearson’s *r* = –0.434; *p* = 0.331; *n* = 7 |

Wild type | MNTB | Pearson’s *r* = 0.155; *p* = 0.740; *n* = 7 |

Wild type | LSO | Pearson’s *r* = 0.550; *p* = 0.201; *n* = 7 |

*Fmr1* KO | VCN | Pearson’s *r* = 0.376; *p* = 0.359; *n* = 8 |

*Fmr1* KO | MNTB | Pearson’s *r* = 0.370; *p* = 0.367; *n* = 8 |

*Fmr1* KO | LSO | Pearson’s *r* = –0.398; *p* = 0.329; *n* = 8 |

P14 | | |

Wild type | VCN | Pearson’s *r* = –0.126; *p* = 0.747; *n* = 9 |

Wild type | MNTB | Pearson’s *r* = 0.807; *p* = 0.005; *n* = 10 |

Wild type | LSO | Pearson’s *r* = 0.136; *p* = 0.707; *n* = 10 |

*Fmr1* KO | VCN | Pearson’s *r* = –0.077; *p* = 0.857; *n* = 8 |

*Fmr1* KO | MNTB | Pearson’s *r* = –0.301; *p* = 0.431; *n* = 9 |

*Fmr1* KO | LSO | Pearson’s *r* = –0.036; *p* = 0.926; *n* = 9 |